Valve mechanism.



PATENTED MAY 12,1903.

J. T. FENT ON. VALVE MECHANISM. APPLICATION FILED APR. 10, 1902.

2 SHEETS-SHBET 1.

N0 MODEL.

ATTO

NITED STATES v Patented May 12, 1903. PATENT OFFICE.

JOSEPH T. FENTON, OF PHILADELPHIA, PENNSYLVANIA.

VALVE MECHANlSM.

SPECIFICATION formingpart of Letters Patent No. 727,772, dated May 12, 1903.

Application filed April 1011902. Serial No. 102,195. (No model.)

T0 aZZ whom it mag concern:

Be it known that I, J OSE-PH T. FENTON, a citizen of the United States, and a resident of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented ,a new and ImprovedValve Mechanism,0f which the following is a full, clear, and exact de scription.

The invention relates to multiple-cylinder engines; and its object is to provide a new and improved valve mechanism arranged to control the admission and exhaust of the motive agent to and from the cylinders in proper succession, to allow of using the motive agent expansively, to permit of varying the cut-0E, quickly reversing the engine, and completely shutting off the motive agent whenever it is desired to do so.

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in, the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding partsin all the views.

Figure 1 is a side elevation of the improvement as applied to a three-cylinder engine. Fig. 2 is a sectional side elevation of the same on the line 2 2 of Fig. 3. Fig. 3 is a transverse'section of the same on the line 3 3 of Fig. 1. Fig. 4 is a sectional side elevation of the same on the line 4 4 of Fig. 3. Fig. 5 is a similar view of the same on the line 5 5 of Fig. 3, and Fig. 6 is an inner face view of the rotary admission and exhaust valve.

The engine-cylinders A, A, and A are regularly disposed on a closed casing B, into which open the inner ends of the said cylinders, the said casing having heads 0 and C, in which is journaled the main shaft D, having a crank D within the casing. The crank D is connected by pitmen E with pistons F, F, and

F mounted to reciprocate in the cylinders A, A, and A respectively, as plainly indicated in Fig. 2. The cylinder-ports a a a extend from the outer ends of the cylinders and lead to the face B of the casing B, carrying the head 0', which latter forms the steam-chest, and the inlet ends of the said ports a, a, and a at the base B are located in a circle to register with the elongated ports '1), b, and b formed in the circular valve G, mounted tobe turned inthe head 0' by the operator. The valve G is for this purpose provided with a handle G, projecting out wardly through a slot C formed in the head 0, and on the said handle is arranged a suitable locking device G under the control of the operator and adapted to engage one of a series of notches 0 arranged on the head 0, adjacent to the slot 0 as plainly indicated in Figs. 1, 3, 4, and 5.

On the outer face of the valve G is fitted the inner face of the admission and exhaust valve H, having an elongated port 0, adapted to register successively with the ports I), b, and b? on rotating the valve H, the latter being provided on its-inner face with an exhaust-cavity d, located diametrically opposite the port 0 and adapted to register with the ports I), b", and b in succession. The exhaustcavity dis in register at all times with an opening G formed centrally in the valve G, and this opening G is in register with the opening 13*, leading to the interior of the casing B, as plainly indicated in Fig. The valve H is mounted to turn loosely on the shaft D, and on the outer face of the said valve are arranged setsof spaced .pins H H, adapted to be engaged'by a carrier I, in the form of a set-screw, screwing in a collar 1, secured by the set-screw to the shaft D, so that when the latter rotates in one direction then the'carrier I is in contact, say, with the pin H ,'and when the engine is reversed, as hereinafter more fully described, and the shaft rotates in the opposite direction then the carrier travels from the pin H to the pin H without rotating the valve H, so that the latter remains at a standstill for the time being.

The head C is provided with a steam-inlet pipe J, connected with a boileror other suitable source of motive-agent supply, and the casing B is provided with an exhaust-pipe J for carrying off the exhaust-steam from the casing to the outer air. Now when the several parts are in the position as shown in the drawings and steam passes into the head 0' by the successively by the port 0 to the ports b, b,- and b which are in register with the ports supply-pipe J then this steam is conducted a, a, and a so that the steam finally enters the cylinders A, A, and A in rotation to drive the pistons F, F, and F therein inwardly in the diuection of the arrow a'. The rotation of the shaft D causes the carrier I in engagement with the pin H to rotate the valve H in the same direction to register the port 0 successively with the ports I), b, and b", as above explained, and at the same time to bring the exhaust-cavity d in register with the opposite ports in the valve G to conduct the exhaust-steam from the cylinders through the corresponding cylinder-ports and ports in the valve G to the central opening G which directs the exhaust-steam through the opening B into the casing B, from which the steam finally escapes by way of the exhaustpipe J. Now by the operator shifting the handle G the valve G is correspondingly moved to reduce the entrance ends of the cylinder-ports a, ct, and a and thereby allow less steam to pass into the cylinders, thus regulating the cut-off for the several cylinders uniformly to any desired degree. By moving the handle G to a central position the ports I), b, and b are completely out 0E from the cylinder-ports, so that no steam passes to the cylinders, and consequently the engine comes to a standstill. When it is desired to reverse the engine, the operator throws the handle G completely otf into a left-hand position, so that the ports I), b, and b finally move in register with the ports 61?, a, and a, and during this movement the port 0, moving in register with one of the ports in the valve G, causes the steam to pass to a cylinder in which the piston is on the return stroke, so that the steam now entering the cylinder forces the piston on the inward or working stroke, thereby reversing the engine. During this reversing of the engine the valve H remains at a standstill for the time being, so as to prevent a too quick return movement of the valve II to allow the engine to gain a desired momentum, so'that all shock or jar is prevented and the engine easily runs in a reverse direction.

It is understood that by the arrangement described the valve Gr assists in exhausting the steam and also forms a cut-off reversing and shut-off: valve completely under the con-- trol of the operator. By the arrangement described the operator has full control of the admission of the motive agent to the cylinders, so that the engines can be run very economically.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A valve mechanism for multiple engines, comprising in combination with a supporting-shaft a revoluble admission and exhaust valve loosely and oscillatabl y mounted thereon having an elongated inlet-port, an exhaust-cavity, and a cut-off reversing and shut-off valve, adapted to' be turned, and interposed between the said admission and exhaust valve and the cylinder-ports, the said cut-oft reversing and shut-off valve having a plurality of ports for registering with the cylinder-ports, the said inlet-port and the said exhaust-cavity, the said cut-cit reversing and shut-off valve also having a central opening, in register at all times with the said exhaustcavity, as set forth.

2. In valve mechanism for multiple engines, the combination with a suitable casing and a supporting-shaft, of a revoluble admission and exhaust valve, loosely and oscillatably mounted on said shaft, said valve having an elongated inlet-port, an exhaust-cavity, and a cut-off reversing and shut-off valve, adapted to be turned, and interposed between the said admission and exhaust valve and the cylinder-ports, the said cut-01f reversingand shut-off valve having a plurality of ports for registering with the cylinder-ports, the said inlet-port and the said exhaust-cavity, the said cut-off reversing and shut-off valve also having a central opening, in register at all times with the said exhaust-cavity, a handle on the said cut-off reversing and shut-oil? valve, a series of notches on the valve-casing, and a spring-controlled lock on said handle for engaging said notches.

3. In valve mechanism for multiple engines, the combination with a supporting-shaft, of a revoluble admission and exhaust valve, loosely and oscillatably mounted thereon, and having an elongated inlet-port and an exhaust-cavity; said valve also having spaced pins, and adjustable means carried by the shaft for traversing the distance between said pins to engage the same to operate the valve for both the forward and the reverse motion of the engine; a cut'off reversing and shutoff valve, adapted to be turned, and interposed between the said admission and exhaust valve and the cylinder-ports, the said cut-off reversing and shut-off valve havinga plurality of ports for registering with the cylinder-ports, the said inlet-port and the said exhaust-cavity, the said cut-oft reversing and shut-off valve also having a central opening, in register at all times with the said exhaustcavity, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOSEPH T. FENTON.

Witnesses:

GEORGE J. KERN, R. Faos'r.

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